Open AccessNanocolumnar CdS thin films grown by glancing angle deposition from a sublimate vapor effusion source
Author(s) -
L. G. Daza,
Ruth Rodríguez,
M. Cirerol Carrillo,
E.A. Martín Tovar,
J. Méndez- Gamboa,
R. Medina Esquivel,
I. Perez Quintana,
A. Iribarren
Publication year - 2019
Publication title -
journal of applied research and technology
Language(s) - English
Resource type - Journals
ISSN - 2448-6736
DOI - 10.22201/icat.16656423.2019.17.1.753
Subject(s) - materials science , crystallite , substrate (aquarium) , cadmium sulfide , thin film , analytical chemistry (journal) , indium tin oxide , deposition (geology) , scanning electron microscope , wavelength , optics , optoelectronics , chemistry , nanotechnology , composite material , physics , paleontology , oceanography , chromatography , sediment , metallurgy , biology , geology
The glancing angle Deposition (GLAD) technique was used to grow cadmium sulfide (CdS) thin films on glass and indium tin oxide (ITO) coated glass substrates from a sublimate vapor effusion source. The samples were prepared under different incident deposition flux angles (a) of 0°, 20° and 80°, while both the substrate and the source were under rotation. The temperature of the source was 923.15 K. Scanning electron microscopy images showed that the GLAD method combined with the source produced dense nanocolumnar shaped structures with height and diameters of ~200 and ~30 nm respectively. The deposited films showed a hexagonal structure with preferential (002) plane orientation and crystallites sizes between ~25 nm and ~35 nm. A maximum solar weighted transmission of ~92% was obtained for the sample prepared at a =80°, with a substrate/source rotation velocity ratio of 55/20 in the wavelength region of 400-900 nm. The average band gap energy of the films was 2.42 eV. Refractive indexes between ~1.4 and ~2.4 at a 550 nm the wavelength were also obtained.